gh-125289: Update sample code in asyncio-task.rst (GH-125292)

* Update sample code in asyncio-task.rst

This will change **coroutines** sample code in the **Awaitables** section and make the example clearer.

* Update Doc/library/asyncio-task.rst

Revert the added print

Co-authored-by: Carol Willing <carolcode@willingconsulting.com>

* Update Doc/library/asyncio-task.rst

Co-authored-by: Carol Willing <carolcode@willingconsulting.com>

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Co-authored-by: Carol Willing <carolcode@willingconsulting.com>